The accumulation and release vehicle group generally consists of a front trolley, a rear trolley and a load beam. Afront shovel is installed on the front car and is connected to the lifting claw through a coupling mechanism, and a tail shovel is installed on the rear car. When the accumulation operation is required, the pneumatic stopper is opened, and the lifting claw on the front car of the No.1 train unit is pressed down to disengage it from the push head on the traction chain, and the No.1 train unit stops running. The No.2 car group continues to move forward until the front shovel of the front car rises along the slope of the rear car of the No.1 car group and drives the lifting claw to descend and disengage from the traction chain open, the No.2 train unit stops running, and so on for subsequent train units. When the accumulation operation is completed, the pneumatic stopper is closed, the lifting claw on the front trolley of the No.1 train unit is lifted up by weight of the front shovel, and the push head on the traction chain is in place to push the No.1 train unit forward. As the No.1 train unit moves forward, the front shovel of the front trolley of the No.2 train unit is detached from the rear shovel of the rear trolley of the No.1 train unit, and the lifting claw is lifted to complete the accumulation operation.
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